I know "preliminary information" has gone out but I do not know what that entails.
Per AMCAS FAQS:
https://www.aamc.org/students/applying/amcas/faqs/109186/faq_schoolsend.html
What is AMCAS sending to medical schools?
AMCAS provides electronic application products to medical schools.
Mailing Label Data: This data includes preferred name, mailing address, phone, e-mail address, state of legal residence, and other selected key data elements. This information is intended to give schools the opportunity to contact applicants interested in their program(s).
Electronic File of Select Applicant Data: This is abridged application data that is made available to medical schools via SFTP. Some of the data included in this file transfer are applicant biographic information, schools attended, coursework, GPAs, MCAT scores, and contact information.
Electronic File of All Application Data: This application data represents the complete set of data an applicant has submitted to AMCAS or data submitted by another in support of the applicant's application. All data in such applications is considered final unless changes are later sent to the schools. Application Data is transmitted electronically via the AMCAS Applicant Data Interchange (ADI) to all designated medical schools in near real time.
Verified Processed Applications: Processed applications represent the complete set of data an applicant has submitted to AMCAS. All sections of the application are available to medicals schools as a printable PDF. All data in such applications is considered final unless changes are later sent to the schools.
Change Reports: These reports will be compiled and delivered electronically to schools each week. These reports reflect changes to selected key data for previously verified applications.